A scientist removed a sample of 37.8 grams of a chemical from a container. The sample was 4 1/4 less than 1/5 of the total mass of the chemical in the container. What was the measure of the total chemical in the container?

Q: The literature value for the Ksp of Ca(OH)2 at 25 °C is 4.68E-6. Imagine you ran th experiment and g...

A: Ksp is solubility product. It is the product of minimum ionic concentration required to precipitate ...

Q: A Titration of a 25.00 ml aliquot of HClO required 22.56 mL of 0.108 M NaOH. What was the concentrat...

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Q: What is the principal quantum number (n), the orbital angular momentum quantum number (l), the magne...

A: Given- Boron (B) Atomic number = 5  

Q: A possible set'of quantum numbers for an electron in the partially filled subshell in a potassium at...

A: Quantum numbers are the set of numbers which describe energy and position of electrons in atoms .

Q: What is the vapor pressure of water at 30.0 °C?

A: 1.) To calculate vapor pressure of water at 30.0°C , we would use Clausius Clapeyron equation. For t...

Q: The reaction of protein with HCHO:     produces carbon dioxide as a product     is permanent and...

A: The reaction of protein with HCHO:  the protein-formaldehyde reaction is a reversible one. 

Q: 3. The following questions are based on the polypeptide chain below. a) How many amino acids are the...

A: Amino acid are special biomolecules which have basic amine and acidic carboxylic group present Here ...

Q: Define the following: A. Extraction B. Infusion

A: Analytical chemistry is branch of chemistry in which we deal with instruments and methods used to se...

Q: calculated below. H-F Bond Energy: 567 kJ/mol example H2 (g) + F2 (g) 2HF AHxn = [energy used for br...

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Q: Phentermine was approved for sale in the United States in 2012 by the FDA. It is a psychostimulant d...

A: Intermediate 1 is known as diazonium salt...  

Q: What conclusion can you make about the relationship between the numi and bond length? ny would the a...

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Q: Ose the etres to access portnt val eded ter thi stien Oxygen gas can be prepared by heating potassiu...

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Q: Determine the concentration (M) of H3O+ in a 0.411 M solution of a triprotic weak acid, H3A, given t...

A: Given,  The concentration (M) of H3O+ in a 0.411 M solution of a triprotic weak acid, H3A, the acid ...

Q: Why is it important to maintain equivalent proportions of reagents in adol condensation reaction of ...

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Q: 1. How many moles of KNO3 are needed to make 450 ml of 1.5 molar solution?

A: Given- Volume = 450 ml = 0.450 L (1L = 1000ml) Molarity = 1.5 M  

Q: A 25.0 mL solution of 0.100 M CH3-COOH is titrated with a 0.200 M NaOH solution. What is the pH afte...

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Q: gives the correct numbers of subatomic particles in an atom of an element with atomic number (Z) 48 ...

A: 1) Atomic mass = number of protons = 48  Mass  number = 120  Number of Neutrons = 120 -48 = 72 proto...

Q: A liquid is exposed to infrared radiation with a wavelength of 4.04x10-4 cm.4.04x10-4 cm. Assume tha...

A: Heat energy and number of photons are related as :  E = nhv  where , E = heat energy in Joules. n = ...

Q: If 0.25 moles of HCL were mixed with 0.25 moles of NaF (in 1.0 L final volume), what would be the pH...

A: pH can be calculated from the concentration of total H+ ions present in the solution. pH = - log [H+...

Q: Suppose the galvanic cell sketched below is powered by the following reaction: Fe(s)+SnCl,(aq) FeCl,...

A: We have given a galvanic cell diagram and it's reaction. Answers and explanation of all these questi...

Q: Gaseous SO2Cl2 reacts with liquid water to form hydrogen chloride gas and liquid sulfuric acid. Usin...

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Q: How many grams of AgNO 3 (molar mass = 169.87 g/mol) are needed to prepare 0.125M solution in 250 mL...

A: Given - Molarity = 0.125 M Molar mass = 169.87 gm.mole-1 Volume = 250 ml = 0.250 L (1L = 1000ml)  

Q: 6.22 Benzoxazinones form covalent adducts with serine proteases. Suggest a plausible structure for t...

A: OH group of serine acts as a nucleophile. OH attacks on the carbonyl group of benzooxazinone which i...

Q: What is the principal quantum number (n), the orbital angular momentum quantum number (l), the magne...

A: In this question, we have to find the principal quantum number (n), the orbital angular momentum qua...

Q: Li o ctly reglux Co,CH3 co, H * Cme : Mdal- SNAC EICB

A: Mechanism  involve Formation  of aldol followed  by E1CB reaction. 

Q: A 6.934 gram sample of an organic compound containing C, H and O is analyzed by combustion analysis ...

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Q: View Policies Current Attempt in Progress A diamagnetic element is an element O that always has an e...

A: Depending upon the behaviour towards a magnetic field, substances are classified into various types ...

Q: What alkene is needed to synthesize the following 1,2–diol using the given reagents? Be sure to answ...

A: Detail mechanistic pathway is given below by which we can detect the actual alkene 

Q: Identify all of the IMF's present between like molecules in a sample of CH3F. Dipole force O Hydroge...

A: Intermoleular forces can be defined as the forces existing between two or more than two same or diff...

Q: NaOH A 400 'C

A: The reaction given is,

Q: Identify two (2) unwanted sources of heat loss and/or gain that may have contributed to the error in...

A: In calorimetry it is assumed that heat lost by warm body is equal to the amount of heat gained by co...

Q: Study the reactions. 1. C2H2 (g) + 2H2 (g) → C2H6 (9) 2. C2H4 (9) + H2 (g) → C2H6 (9) 3. C2H2 (g) + ...

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Q: What is the frequency in hertz of blue light having a wavelength of 457 nm? x 10 Hz eTextbook and Me...

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Q: following statements below correctly describes isotopes?  a. They are of the same number of neutrons...

A: Atomic number = number of protons  Mass number = number of protons + number of neutrons

Q: Initially, 0.760 mol of A is present in a 2.00 L solution. 2 A(aq) = 2 B(aq) + C(aq) At equilibrium,...

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Q: Hypochlorous acid, HOCI(aq), is a weak acid (Ka = 4.0 x 10-8) used in the chlorination of drinking w...

A: a.) To calculate pH , we would draw an ICE table and use its Ka value.  b.) Percent ionization is Ca...

Q: An analytical chemist is titrating 84.9 mL of a 0.2500M solution of hydrazoic acid (HN,) with a 0.74...

A: Here we have to determine the pH of solution if 20.9 ml of 0.74M solution of NaOH is added to 84.9 m...

Q: Griven domats of cyclohexame is o-7785glm and AHamb=-46.6KI|| Hole Many Jaurneddo vreleade ag mmuch ...

A: Heat of combustion is the heat energy released when 1 mol of a substance is burnt.   

Q: Four of the following five sets of quantum numbers are not allowed. Choose the a 4 3 -4 +1/2 in m 1 ...

A: Given : We have to tell which of the following is allowed set.

Q: Current Attempt in Progress What is the correct full range for the values of m, the magnetic quantum...

A: Given-> 3d electron  

Q: Re-order each list in the table below, if necessary, so that the atoms or ions in it are listed in o...

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Q: In acidic solution: 1. PbO2 + I2 → Pb2+ + IO3 Oxidation half-reaction: Reduction half-reaction: Comp...

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Q: Q4) A cube of ice of mass 100 g is put into a glass of water at just above 0"C, When the ice melts, ...

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Q: Trial 1 Trial 2 Mass of ice Mce (grams) 79 79 Mass of warm water 120 119 Mwater (grams) Initial temp...

A: Heat lost by substance at higher temperature is equal in amount to the heat gained by the cold body ...

Q: Three students are preparing alkoxides in the lab by mixing sodium metal with a suitable alcohol. St...

A: The rate of the formation of the product or the rate of disappearance of the reactants is known as t...

Q: Q4) A cube of ice of mass 100 git put into a gloss of water at just above 0°C. When the ite melts, a...

A: Given,  Heat absorbed in fusion of 100 g ice = 33KJ. Temperature of the system = 0°C.  And entropy c...

Q: A sample of iron ore weighing 0.2792 g was dissolved in dilute acid solution, and all the Fe(II) was...

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Q: Problem 1. Derive an expression and calculate a numerical value for the lifetime in seconds for the ...

A: We have find out numerical value for the life time in seconds.

Q: Using photoelectron spectroscopy, the ionization energy of the least tightly bound valence electron ...

A: Given,  Ionisation energy = 5.40 eV Electronic configuration of Li = 1s22s1  Principal quantum numbe...

Q: 8

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Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".